As soon as you enter the Tower of Babel, head forward along the linear pathway. Cecil will remark that the party can't enter the tower, but Edge allows the party to get in. As soon as you're inside, go leftward to grab the Unicorn Horn from the treasure chest, then continue to circle around the linear pathway leftward, then southward, then rightward. Don't enter the door you come across immediately - instead, continue rightward, then upward to the treasure chest holding the Silver Hourglass there. Then, head back to the door and through it to access the next floor in the tower.

Here, head forward, and then head leftward. A bridge will extend to the south halfway across this area as you head leftward. At the bottom of the bridge is a treasure chest full of monsters. Fend off the monsters to acquire the Ogrekiller, which you can equip on either Kain or Cecil if you so desire. Then, head back up to the main path, continue heading leftward, then southward, and then go through the door you come across to gain access to the third story of the tower.

Once up here, head southward and then eastward. Pass the door you come across for just a second and grab the Kiss of Lilith from the treasure chest you come across to the east of the door. Then head back to the door and go through it to get to the fourth floor of the tower. Here, don't head left (it's a dead end), but instead, head right and then northward, following the linear pathway. As the pathway begins to head westward, make sure to stop and grab the Ahuna from the treasure chest, which you should equip on Edge in lieu of one of the Kunai swords already equipped on him. Then, simply follow along the rest of the linear corridor to a door leading back to the third floor of the tower.

Go rightward, ignoring the pathway leading down to the blue orb-like thing (it's nothing), and instead, enter the first of the two doors you come across on the far right side of the room. In this room, you'll find a save area so you can save your game and heal your party. The adjacent door will bring you to another small room where you must simply take the alternate door. Then, head southward, and around, approaching the figures you see standing there.

The creatures you will face off against here are the mutated forms of the King and Queen of Eblan - Edge's parents. In this emotional pseudo-boss fight, pound away at the King (don't worry about the Queen) until they "begin to transform." At this point, don't waste any more of your attacks or magic spells or anything, as after some sad, touching dialogue between Edge and his parents, they die. You'll need your energy saved since after this, a boss fight with Rubicante will commence (although you can retreat back to the save area to heal and save if you need to). Otherwise, enter this battle with Edge learning two new spells just for this occasion.

Boss Battle XV - Rubicante

HP

34,000

Weakness

None.

Resistance

Nearly Everything.

Absorb

Fire.

EXP

18,000

Gil

7,000

Rubicante is actually extremely easy considering you have some powerful tools at your disposal to use on him at this point. While many people make a huge fuss over his cloak being over his body or not (and hence representing if magical attacks will hurt him or heal him), you'll simply want to keep a barrage of spells and attacks on him regardless since he is not often in his "heal mode." Rydia should cast Shiva, which will do 5,000 HP+ damage per turn, as will Kain's jump. Cecil should attack physically and Edge should use Shurikens or one of his ninja spells, such as Flood. Rosa should act as team healer. The only attack Rubicante uses that you'll want to watch out for is his Glare attack, which can kill a party member instantly.

When Rubicante is defeated, he'll retreat (for now). Suddenly, some Eblan officials come in through the door and confront the party. When they ask where Rubicante is, the party informs him that he's been defeated for now. After Edge resolves to join the party on their journey to stop Golbez, the party will work their way into the crystal room. But a trap will send them flying down to a story below.

Grab the Hi-Potion from the treasure chest above you, then dart your way southward, and then through the door at your left. Here, simply run upwards and through another door. Once down at the bottom of this area, you can head either left or right. First, head right and upward to a treasure chest holding a Hi-Potion. Then, head leftward and up through a door. This will bring you to the airship hangar. Your team now has an airship in the Underworld.